Municipal domestic waste leachate (A/O)2 combined membrane biochemical reaction-reverse osmosis membrane treatment process

Abstract

The invention discloses a municipal domestic waste leachate (A/O)2 combined membrane biochemical reaction-reverse osmosis membrane treatment process. A core process comprises an (A/O)2 combined membrane biochemical reaction system and a reverse osmosis membrane system. The (A/O)2 combined membrane biochemical reaction system is a membrane bio-reactor adopting a low-circulation multistage denitrification process and combines links like separate-stage nitrification, denitrification, multi-source water quality adjustment and ultrafiltration/microfiltration membrane outgoing membrane separation. In the reverse osmosis membrane system, compact membrane characteristics of a reverse osmosis membrane are utilized, most of ions and all of suspended matters are intercepted, and organic matters and other small-molecule substances degraded by a biochemical treatment method are further separated. The process has the advantages of high water quality adaptability, high treatment load, high treatment efficiency, small facility occupation area, low comprehensive energy consumption and stable quality of outgoing water, and is suitable for wastewater treatment with high organic matter concentration, high ammonia nitrogen and total nitrogen concentration and strict requirements on outgoing water.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a municipal solid waste leachate (A / O) 2 Combined membrane biochemical reaction-reverse osmosis membrane treatment process. Background technique [0002] Leachate (also known as leachate) is in the process of urban solid waste landfill, due to compaction and the action of microorganisms, the pollutants contained in the garbage will be dissolved with water and formed together with rainfall, runoff, etc. Leachate is the secondary pollution produced in the landfill process, which can cause hypoxia, water quality deterioration, and eutrophication of surface water bodies, threaten drinking water and industrial and agricultural water sources, and make groundwater lose its use value. Organic pollutants entering the food chain will directly threaten human health. [0003] Because leachate is different from general wastewater, it is characterized by high organic pollution load, extremely...

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Problems solved by technology

[0005] "Standards for the Control of Pollutants in Domestic Garbage Landfills" (GB16889-2008) was promulgated and implemented in April 2008. It has very high requirements for the discharge of pollutants in landfills. There is no unified understanding of the treatment technology for landfill leachate at home and abroad. , all kinds of ideas and applications are in the stage of trial and exploration. Most research units adopt the method of adding treatment links or advanced treatment equipment for the transformation of existing projects. However, due to the immaturity of process control and treatment equipment, duplication of facilities Construction, excessive reliance on foreign patented equipment, unstable system operation, and inconvenient maintenance, etc., eventually resulted in the high unit construction cost of the leachate treatment plant and difficult to control the operating cost

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